被动语态可以省略be动词嘛?但是为什麽在选择题里面一定要选带be的?

被动语态的格式就是：be + 过去分词； 如果被动是作为谓语，不能省略BE，如果是作为定语去修饰一个名词，则可以省略。

不可以
被动语态的用法：
1. 一般现在时的被动语态构成：is / am / are + 及物动词的过去分词
Our classroom is cleaned everyday.
Knives are used for cutting things.
2. 一般过去时的被动语态构成：was / were + 及物动词的过去分词
A new shop was built last year.
Dinosaur eggs were laid long long ago.
3. 现在完成时的被动语态构成：has / have + been + 及物动词的过去分词
This book has been translated into many languages.
Many man-made satellites have been sent up into space by many countries.
4. 一般将来时的被动语态构成：will+ be + 及物动词的过去分词
A new hospital will be built in our city.
Many more trees will be planted next year.
5. 含有情态动词的被动语态构成：情态动词+ be + 及物动词的过去分词
Young trees must be watered often.
Your mistakes should be corrected right now.
6. 现在进行时的被动语态构成：am / is / are + being + 及物动词的过去分词
Uncle Wang is mending my bike now.→ My bike is being repaired by Tom now.

7. 不定式的被动语态：to + be + 及物动词的过去分词
There are two books to be read. → There are twenty more trees to be planted.

不可以.
被动语态的用法就是be+过去分词
但是也有省略情况，一般是因为主句已经有be,作为从句省略另外一个.
还有就是作为名词的被动语态，例如cloned sheep

不可以 被动语态的固定形式就是be+过去分词

额.如果这个是主句的话,一定要带Be动词的,但是如果是从句的话,可以省略,我想想.
for example:
Seen from the map,it is clearly to konw the location of the city
我自己想的,很久不翻语法书了
Hope it helps